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Modeling of Hysteresis and Backlash Within a Smart Fin With a Piezoelectric Actuator

[+] Author Affiliations
Mohamed B. Trabia, Woosoon Yim, Mohammad Saadeh

University of Nevada, Las Vegas, Las Vegas, NV

Paper No. SMASIS2010-3746, pp. 543-553; 11 pages
doi:10.1115/SMASIS2010-3746
From:
  • ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
  • ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1
  • Philadelphia, Pennsylvania, USA, September 28–October 1, 2010
  • Conference Sponsors: Aerospace Division
  • ISBN: 978-0-7918-4415-1 | eISBN: 978-0-7918-3886-0
  • Copyright © 2010 by ASME

abstract

This work presents a dynamic model of a smart fin, which is activated by a piezoelectric bimorph actuator that is made by bonding two Macro Fiber Composites (MFCs). The actuator is completely enclosed within the fin. Earlier research has indicated that the use of a linear model for the fin dynamics does not fully describe the fin. This work presents a more realistic approach to the problem by incorporating additional components into the model. Therefore, a proportional damping matrix is introduced. It was also observed that experimental results exhibit hysteresis and backlash. A Bouc-Wen hysteresis model is combined with two backlash operators to model the observed saturation and the non-symmetry of the response. Hybrid Fuzzy Simplex Genetic Algorithm (HFSGA) is used to identify the optimal set of parameters for the damping matrix constants, the Bouc-Wen model, and the backlash operators. The results show that proposed method can predict the hysteresis of the smart fin–actuator system under various operational conditions.

Copyright © 2010 by ASME

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